Base station and a communication control method

PROBLEM TO BE SOLVED: To improve a throughput after a congestion is avoided.SOLUTION: In a base station, a transmission buffer 251 stores a TCP packet transmitted from the base station through a radio channel to a communication terminal. A congestion control unit 245 controls a TCP packet inflow to the transmission buffer 251, on the basis of a minimum window value between a congestion window value and a reception window value reported from the communication terminal. A congestion window value set unit 243 decreases the congestion window value to a predetermined value, when the TCP packet residence amount in the transmission buffer 251 becomes a threshold or greater. Also, when the TCP packet residence amount in the transmission buffer 251 falls below the threshold after the decrease of the congestion window value, the congestion window value set unit 243 sets the congestion window value to a value greater than the predetermined value and to the reception window value or greater.SELECTED DRAWING: Figure 3